They tried to kill Paul by stoning him at Lystra, Acts 14:19-20

A common way to kill people in those days was to have a mob throw rocks at them until they died. The crowd supposed Paul was dead but he just got up and carried on with his preaching.

The next day Paul and Barnabas left for Derbe later having won a large number of disciples they went back to Lystra where Paul had been stoned a short time ago.

Background Reading:

Paul at Lystra

14:19 But some Jews came from Antioch and Iconium and won over the crowds by persuasion. They stoned Paul and dragged him out of the town, thinking he was dead. 20 But the disciples formed a circle around him, and he got up and went back to town. The next day, he went on with Barnabas to Derbe.Acts 14:19-20